Sandpapering-roller.



A. A. B'AGALIO. SANDPAPEBING ROLLER. ArPLIoATIoN FILED JULY 1a, 1910.

Patented Jan. 24,1911.

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mW-23m A. A BAGALIO.

SANDPAPEBING ROLLER.

APPLICATION FILED JULYlS, 1910. I 982,774. Patented 1111124, 1911.

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UNITED` STATES PATENT OFFICE.

ANDREW A. BAGALIO, OF NEW YORK, N. Y., ASSIGNOR TO HENRY ROWLANI), F NEW YORK, N. Y.

SANDPAPERINGeROLLER.

To all whom fit may concern:

Be it known that I, ANDREW A. BAGALIo, a subject of the King of Italy, and a resident of 1435 Minford place, Bronx borough, New York city, and State of New York, have invented a new and useful Improvement in Sandpapering-Rollers, of which the following is a specification. l

This case is a division of my application for floor surfacing machines, tiled March 18th, 1910, Serial No. 550,221.

The object of my invention is to provide a roller of this class which will be siniple,

` durable and efiicient, and which will hold the sand paper firmly and securely and stretch the same tight at all times regardless of the amount of stretching of the sand paper or similar abrasive while in use. This object is accomplished by my invention, one embodiment of which is hereinafter set forth.

For a more particular description of this invention, reference. is to be had to the accompanying drawings forming a part hereof in which:

Figure 1 is a sectional view taken on the line 1-1 of Fig. 9., looking in the direction of the arrows, a portion of the sand papering roller and bed of the machine being shown. Fig. 2 is a plan View' partially in section, of the structure partially shown in Fig. l. Fig. 3 is an enlarged sectional view showing the clamping mechanism. Fig. 4 is a reversed elevation of a portion of the structure shown in Fig. 3. Fig. 5 is a perspective view of a cam shaft and a cam.

Throughout the various views of the drawings, similar reference characters designate similar parts.

In the structure herein described, the bed 4 of a sand papering machine is partially shown. 27 designates the top of this bed on which are suitable machined surfaces QS adapted to support the motor, and forward of this is an inclined portion 31 provided with ears 32 adapted to receive pivots which pass through corresponding ears on a cover which is not shown. A. suitable opening 33 is formed in the bed 4t forward of the ears 32, and in this opening the sand papering roll is received. This roll 55 is mounted on a suitable shaft 38, which revolves in suitable bcarings 37 which are preferably formed integral with the remainder of the Specification of Letters Patent.

Patented Jan. 24, 1911..

Divided and this application filed `Tuly 13.

bed 4. This bed is suitably reinforced by webs 15. The extreme forward end 311 of the bed et may carry a knife 53 held in place by Screws 54. 4This knife forms a slide adapted to ride on t'he lloor being surfaced but performs no other function while the sand papering roller is in use. It performs a very important function when the sand papering roll is replaced by a cutter head as described in my said application.

The sand papering roll 55 is composed of disks 56 mounted on the shaft 38, which disks carry a cylindrical shell 57 whose ends are separated to permit sand paper to be passed therethrough at its ends where it is held by jaws 5S. The shaft 3S has two square portions tSO against which rests a Iasting (il, which has one of the jaws G2 and to which the other jaw (S3 is secured by pivots (34 and small bolts 65, each of which are surrounded by coiled springs (36 at one end. and nuts (37 on the bolts (35 and normally force the jaws (Si). and (53 together so that when these jaws a re separated, they are separated by cams (58 on a shaft (it) pivoted in the disks 5G. This shaft (3S) has a suitable -recess 70 which is adapted to receive a key through which it may be rotated. The cams (3S are preferably segments of cylinders, as shown, extending about 120 degrees, and these engage lugs 71 on the jaws 62 and thus cause the casting (il to move against the tension of coiled springs 7 2 resting on the bottom of the casting 61 and surrounding lugs 7 3. As the cams (S8 are further turned, they next, after raising the jaws 58, engage surfaces 74 on the jaw G3 and force this jaw from the jaw (i2, against the tension of the springs G6, and this continues until these cams (S8 reach stops 75 on the jaw 63, at which time the jaws (39. and 63 are suficiently opened to permit the ends of the sand paper 76 to be inserted. Then the movement of the cams is reversed, the jaws 62 and 63 close on the sand paper 7 G and grip the same firmly with the aid of projections 77 on the jaw G9. and 78 on the jaw 63, and as these cams are further turned, the lugs 71 are cleared and then the springs 72 act to draw down the jaws 58 and thereby draw the paper 76 tight on the surface 57 and keep it so regardless of the amount of stretching while in use. By again re- These springs G6 engage the jaw G2 versing the movement of the cams 68, the paper 76 may be released and replaced from time to time, as desired. The casting 61 is so shaped as to ride true on the parts 60.

It will be observed that the parts of the roller above described are well balanced with regard to the aXis of the shaft 38, so that this roller will run true at all speeds. Vorn out paper can easily be removed by inserting a key inthe recess 70` as described above, so that not only is the sand paper or similar abrasive readily insef'fted or removed, but it is held firm and true at all times and properly stretched by a spring 72.

While I have shown and described one embodiment of my invention, it is obvious that it is not restricted thereto, but is broad enough to cover all structures that come within the scope of the annexed claims.

Vhat I claim is:

1. In a sand papering roller of the class described, a shaft, pivotally connecting` jaws mounted on said shaft, springs and'bolts adapted to close said jaws and cause the same to grip sand paper, and cams adapted to separate said jaws.

2. In a sand papering roller of the class described, a shaft, pivotally connecting jaws mounted on said shaft, springs separating said shaft and a portion of said aws, means for holding said jaws in contact, so as to grip sand paper and cams and means for .mounting the same, whereby said cams may compress said springs and separate said jaws, or may be made to permit said jaws to come in contact and remove some of the tension from said springs.

3. In a sand papering roller of the class described, a shaft with square:4 vportions thereon, disks mounted on said shaft and a cylinder carried by said disks, pivotally connected jaws sliding on said square portions, means for holding said jaws in contact when not forced apart, a cam shaft mounted in said disks, springs between said first mentioned shaft and portions of said jaws, cams on the cam shaft and projections on said jaws, so that when said cam shaft is turned in one direction, the springs are compressed and the jaws are separated, and when vthe cam is turned in the other direction, the jaws are brought together, and the lsprings are released. l

a. In a sand papering roller of the class described, a cam shaft 38 having square portions 60, a part 61 having a aw 62 integral therewith, and a jaw 63 pivoted thereto, coiled springs 72 separating the part 6l from the part 60, disks 56 mounted on said shaft 38, a cylindrical shell 57 mounted on said disks, a cam shaft 69 mounted between said disks, cams 68 mounted on said cam shafts, bolts 65 and springs 66 adapted to force said jaws to grip the sand paper carried by the roller and suitable surfaces on the jaws 62 and 63 engaged by the cams 68, whereby the spring 72 is compressed Vi".2 i.

and the jaws are separated when the cam shaft 69 is revolved in one direction and the jaws are allowed to come together, and the spring 72 expanded when the cam shaft 69 is turned in the other direction.

ANDREW A. BAGALIO. Witnesses:

O. E. EDWARDS, Jr., E. PinnnnPoN'r RowLAND. 

